Akụrụngwa Ngwaahịa:
A na-eme isi ihe dị ka 8mm ukwu dị elu pp (polypropylene) bọọdụ, na ike
acid na alkali na-eguzosi ike, a na-ejikwa ya na-eme ihe ndị ọkachamara
Otu agba na-agbakwunye mkpanaka, acid siri ike na-eguzogide, mmetụta na-emegide, enweghị corrosion, ọ nweghị nchara.